1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15bd22269d0960d5c6d53c60f413f09c6740b155a22aa7a05f15ea19ed86685. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d23a8f40-a1d3-4bcc-9240-25438445273b.json and https://artists.proofprofile.net/proofs/artist/d23a8f40-a1d3-4bcc-9240-25438445273b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28aafa7b2c8eb7e2265b93f706d4324738689239c0b1965e977a41d3a0969e98. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPH12200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed03aa42b47c9413b92064b41b4d62f79b111d6d8a6651a318d424d63cac3ee. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPH12200197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d2ea83c82323a87242303aaae476abbef87191ff61a648b29e05c2d69fcaf4. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPH12200198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cd9a0184f3eeedf2348b93949915fa1dcd8d4ab6fd755bbcf850af740288c1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPH12200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d645e494255841a0e9b5704425edf7e561a968b6d8a54cef43261a3a263d93. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPH12200200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e902f146d18e4d2983738f505514fdf22ab7f14fa8d56a8e4e6494b83c3444. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPH12200194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83fa7d435a80f1fda03de22f7a1d6ca9bfeff2d0d67e3a71faeca14295b304c5. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPH12200201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2794a857bbf30d2ed9e979f4dadcf731e67c0355969ffa8c910ef0a82ae4fb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:17:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPH12200202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658eea01d5163bdafc1a3fdfb4452f3a7cab82e694eed6ccfce79704bdc8aa66. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPH12100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc497e31af07e984aad71b228844f073bab42cd8a21064094018042552570636e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:03:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEPH12100172.